Helookedaroundandcaughtaman_______handintothepocketofa passenger:
A. put
B. tobeputting
C. toput
D. putting
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Whenyou arelearningtodrive,_______agoodteachermakesabig difference.
A. have
B. having
C. andhave
D. andhaving
Ifeltitagreathonor_______tospeaktoyou.
A. toask
B. asking
C. tobeasked
D. havingasked
MCS-51单片机与DAC0832的接口电路,常用的有直通方式、单缓冲方式和双缓冲方式。
A. 对
B. 错
ADC0809是几位模/数转换芯片?
A. 4
B. 16
C. 12
D. 8